Extrusion polystyrene board(XPS board)is made with polystyrene.It's sealed and foamed structure helps to have many advantages, incuding high-resist compression,waterproof,moistureproof,air proof,light weight,anti-corrosion,long service life and low conductivity factor and so on. Technical information Thickness: 6-100mm Width: 600 900mm Length: 900 2400mm Compressive Strength: >=250Kpa Density:35-40kg/m3 Thermal Conductivity: <=0.029 W/(m.k)(25 centi degree) Dimensional stability: Maximum 1.5% Water Absorbability: <=1.00% Moisture Permeability: <=2.0 Superior performance make it fit for a wide range of acoustic and thermal insulating applications, including roofing, wall, freezing plant, floor etc.XPS foam board can also becovered with aluminum or thin cement polymer mortarwith fiberglass mesh. Minmum order is 40'GP